<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Bootstrap 101 Template</title>
    <link href="../../bootstrap/css/bootstrap.min.css" rel="stylesheet">
    <style type="text/css">
        section {
            margin: 10px;
            outline: 1px solid red;
            padding: 10px;
        }
    </style>
</head>
<body>

<section id="btn-group">
    <article class="btn-group">
        <button type="button" class="btn btn-info">左</button>
        <button type="button" class="btn btn-success">中</button>
        <article class="btn-group">
            <button type="button" class="btn btn-warning">右1</button>
            <button type="button" class="btn btn-danger">右2</button>
            <button type="button" class="btn btn-primary">右3</button>
        </article>
    </article>
</section>

<section id="btn-group-vertical">
    <article class="btn-group-vertical">
        <button type="button" class="btn btn-info">上</button>
        <button type="button" class="btn btn-success">中</button>
        <button type="button" class="btn btn-warning">下</button>
    </article>
</section>

<section id="btn-group-size">
    <article class="btn-group btn-group-xs">
        <button type="button" class="btn btn-info">左</button>
        <button type="button" class="btn btn-success">中</button>
        <button type="button" class="btn btn-warning">右</button>
    </article>
    <article class="btn-group btn-group-md">
        <button type="button" class="btn btn-info">左</button>
        <button type="button" class="btn btn-success">中</button>
        <button type="button" class="btn btn-warning">右</button>
    </article>
    <article class="btn-group btn-group-lg">
        <button type="button" class="btn btn-info">左</button>
        <button type="button" class="btn btn-success">中</button>
        <button type="button" class="btn btn-warning">右</button>
    </article>
</section>

<section id="btn-toolbar">
    <article class="btn-toolbar">
        <article class="btn-group">
            <button type="button" class="btn btn-info">左</button>
            <button type="button" class="btn btn-success">中</button>
            <button type="button" class="btn btn-warning">右</button>
        </article>
        <article class="btn-group">
            <button type="button" class="btn btn-info">左</button>
            <button type="button" class="btn btn-success">中</button>
            <button type="button" class="btn btn-warning">右</button>
        </article>
    </article>
</section>

<script src="../../jquery/jquery-3.2.1.min.js"></script>
<script src="../../bootstrap/js/bootstrap.min.js"></script>
</body>
</html>